My SIL, who has a very mild peanut allergy, is planning on avoiding all peanut products while pregnant (she eats foods that "may contain nuts" sometimes.) She's the only person I know who plans on doing this. I eat nuts and strawberries and all those other foods while pregnant.

As to the allergy question, my midwives (and several studies support this as well) suggested probiotics from 1st trimester through 6 mos of EBF. It greatly increases your baby's immunities and decreases chances of allergies later in life (including eczema). So if you're worried about allergies i'd suggest checking out probiotic supplements.

Peanut allergies do not run in our families, and I lived on peanut butter my last pregnancy. DD is 16 1/2 months old and we have been SLOWLY introducing peanut butter to her (thinly spread on a cracker, pb covered pretzels, etc.) and she has had no reaction.